Business Combinations - Additional Information (Detail) (USD $)	1 Months Ended			12 Months Ended				1 Months Ended
	Aug. 03, 2011 American University Of Caribbean State Person	Aug. 03, 2011 American University Of Caribbean Title Four Eligibility And Accreditations	Aug. 03, 2011 American University Of Caribbean Trade Name	Jun. 30, 2012 Faculdade Boa Viagem Person Facility	Feb. 29, 2012 Faculdade Boa Viagem	Feb. 29, 2012 Faculdade Boa Viagem Title Four Eligibility And Accreditations	Feb. 29, 2012 Faculdade Boa Viagem Trade Name	Apr. 30, 2011 ATC International	Apr. 02, 2012 Falcon Physician Reviews
Business Acquisition [Line Items]
Business acquisition, cash paid	$ 226,000,000				$ 24,200,000			$ 4,800,000	$ 5,400,000
Additional earn-out liabilities								4,300,000
Amortizable intangible assets, estimated useful lives								9 years 6 months	5 years 9 months 18 days
Number of Students	1,200
Number of graduates licensed and practicing medicine	4,000
No of states where graduates are eligible to practice	50
Intangible assets	131,400,000				19,108,000			4,639,000	2,260,000
Intangible assets not subject to amortization		100,000,000	17,100,000			13,500,000	2,300,000
Expected additional installment payment for acquisition					$ 21,900,000
Number of students in Degree programme				5,800
Number of campuses				3